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• FFMpeg overlay and fade images and text in and out at over video background

  28 décembre 2019, par grootester

  Prior to applying the drawbox and drawtext text option I was able to fade in and out images easily. However, attempting to incorporate the drawtext produces unwanted errors. Any ideas how this could be rememdied ? Love to show multi-line text (different fonts) centered over box at specific times with fade in fade out times that works alongside images fading in out at specific times.

  ffmpeg -i vids/testVid.mp4 -loop 1 -i slideshow/pic1.png -loop 1 -i slideshow/pic2.png -loop 1 -i slideshow/pic3.png -i slideshow/pic4.png -filter_complex "[0:v]drawbox=x=40:y=40:w=250:h=75:color=white,drawtext=fontfile=arialb.ttf:fontsize=24:font color=black:text=Micky Mouse,drawtext=fontfile=arial.ttf:fontsize=24 : font color=black:text=January 1st 1938 — December 19th 2019fade=st=0:d=1:alpha=1,fade=out:st=5:d=1:alpha=1,trim=0:6,setpts=PTS+4/TB[ovr1] ; [2]fade=st=0:d=1:alpha=1,fade=out:st=5:d=1:alpha=1,trim=0:6,setpts=PTS+10/TB[ovr2] ; [3]fade=st=0:d=1:alpha=1,fade=out:st=5:d=1:alpha=1,trim=0:6,setpts=PTS+16/TB[ovr3] ; [4]fade=st=0:d=1:alpha=1,fade=out:st=5:d=1:alpha=1,trim=0:6,setpts=PTS+22/TB[ovr4] ; [0:v][ovr1]overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/2:enable=’between(t,4,10)’[base1] ; [base1][ovr2]overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/2:enable=’between(t,10,16)’[base2] ; [base2][ovr3]overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/2:enable=’between(t,16,22)’[base3] ; [base3][ovr4]overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/2:enable=’between(t,22,28)’[out]" -map "[out]" -c:v libx264 -c:a copy -flags +global_header -crf 27 -preset veryfast -s 1920x1080 -y slideshow/outTest.mp4

• FFMPEG Image overlay Fade in and out on Video not working properly

  24 août 2015, par HardCore CODER

  hi i have a video around 30 second and i want to set overlay image between 5 - 10 second only and play remaining video as per as.

  But i have an issue the video start with black screen and fade in on 5th second and play well upto 10 second and fade out to black after 10 second and whole video is black screen upto 30 second

  -i input.mp4 -i 34232944.png -filter_complex " [0:v][1:v] overlay=0:0:enable=’between(t,5,10)’,fade=t=in:st=5:d=1,
  fade=t=out:st=10:d=1 ’" -c:v libx264 -crf 23 output.mp4

  video link :-
  https://www.dropbox.com/s/vmbed5vxtakfhg5/TinyTake24-08-2015-02-59-59.mp4?dl=0

  Please help me.
  Thanks

• Issue transcoding H.265 to H.264 stream with FFMPEG

  5 octobre 2023, par Diego Satizabal

  I'm having an issue trying to do some tests restreaming an H.265 stream to H.264 as follows :

  


  

  • I use a MP4 file as video source, then I use VLC to stream it with H.265 codec as follows :

  


  


  

  1. I go to media -> stream menu, then select a file and stream :

  


  


  

  


  

  2. The second step allows me to add a destination for the stream, I chose HTTP :

  


  


  

  


  

  3. The next step allows me to select a profile, I select Video - H.265 + MP3 (MP4) profile leaving the Activate Transcoding option :

  


  


  

  


  


  • Previous steps allow me to stream the video file, I can open another instance of VLC and open the URL of the created stream (http://localhost:8080/test) and it is able to playback the stream. Moreover, if I go to Tools -> Codec Info menu I see that the playback indeed uses H.265 codec.

    


  


  • Then I try to use FFMPEG library to take that input stream and transcode to two separate stream, one H.264 for a copy of the video and another an opus audio output with the following command :

    


  


  


  ffmpeg -i http://localhost:8080/test -c:v libx264 -bsf:v h264_mp4toannexb -b:v 2M -profile:v baseline -pix_fmt yuv420p -x264-params keyint=120 -max_delay 0 -bf 0 -listen 1 -f h264 unix:/tmp/myvideo.sock -c:a libopus -page_duration 20000 -vn -listen 1 -f opus unix:/tmp/myaudio.sock


  


  But I get the following error :

  


  

  


  If I try RTSP instead of HTTP it works but the stream is awful, I can barely see some frames on the receiver and the video usually freezes or just shows black.

  


  I'm using Ubuntu with VLC 3.0.18 and FFMPEG 4.4.2.

  


  I have specific requirements to handle the live streams, I cannot just convert and save to a new container (MP4 file) the transcoded video, I require a source streaming H.265 and transcode the stream to be injected into a WebRTC server (requiring H.264 as input).

  


  Any help/suggestion is much appreciated in advance !